1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaccde75d938c9bb848aa17a6078a8dd30622887875bf88b7194a287b40bcf7ea. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fe9a9631-8576-47b2-8de5-c41439673d5e.json and https://artists.proofprofile.net/proofs/artist/fe9a9631-8576-47b2-8de5-c41439673d5e.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc503c0bcf27304e73f4de22d1c5e1651b766625de8b99918a6be29fe92d3e181. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US83Z2102163.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf770d69db8d67396a672f46dcd44861ef2147f58ee31c9ec75d0ebb1e9842fb6. Chain 2 (Bitcoin): anchored in block 957867 (2026-07-13T14:55:20Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US83Z2206346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52133a0e3e727ec3782734888c9e47637dda0fa8540122b754d1837e2d155a7b. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US83Z2330916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc71fa833508c6eee248c2a2f0e58094abcb4a5e4d9917b86c5dd21142b3558d2. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US83Z2488094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x829a56d29e370a1a491500e1858e880b044c6f0c1fa9850330edc1af10adecf0. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US83Z2488636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c6710ac4e879c3f7a9379cdba2e865a7c66043d066fa2fe6266228c891389e7. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US83Z2491425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce898d6016126f34906260548d1695ebe159904ffc38fa39a798bebe8db5daf5. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US83Z2491933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc256f639939dcda067aea0145514b8299ea0b1fe82569d234e6a3e6b124ab331. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US83Z2494726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8e58a8a648a129dd2080d7071cd51a3ca9d8c0b73334f0a4646cb9e3f7de944. Chain 2 (Bitcoin): anchored in block 958242 (2026-07-16T05:02:52Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US83Z2499028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e296fd17d720b86231b9df974e74466f81ca90c8adc71562cb9db4fcdeed3d0. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US83Z2400845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x389160a6aea6ed3d8151147691accebe628125a3ec98c397d1c6dca471b8c10a. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US83Z2402905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74ca63aeb54b2c61787a2003f7d3c1593606530b53f61862b944cdfce9d19ef4. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US83Z2404701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x392368a6192c22ca10913139197dd12ad86fb7d5f8ed1938a390761fbaf46c49. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US83Z2406837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b404a09531009652feeba1abf1d466bd04b63e38dd5b158da686459e6665031. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T02:01:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US83Z2406834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa9b0121133645f96e48f7bd4903bcb040b3952385147db0a6d6b2212fac17ea. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US83Z2406835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaae6d89528cac70ff37b5f033f75e7c427c387dccd7450695dadbb55e43a810f. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US83Z2422922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d677720113101e285832cc9402c85fb33f28dae4cc4a14e41979e01eea6ebb9. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US83Z2425860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9d55e83de85584d696839890614be1b638795fa269149da9bb70e791b9f0731. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US83Z2427180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd61a8e5fd4f505c28d12130ad1a60f57fcbd9da8adf74d34b75ae15b3b212ee. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US83Z2429980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78ef2cac533664527426ea4b3966813c6483e9e2fc25ba0a608c6e104fc00f6a. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US83Z2500232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc59f3fcdb1bf43e035e6065b8e5dfdacd8693646e6fe27d562cce5c563e2e9f8. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US83Z2504479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccb4dc7a22c541ffa0316e17ecd3898326b83afef784c5f300575077e72387f7. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US83Z2520037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cc75f0426e25573fe74a92574057c984dc09ee028544260388e5e85913212df. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US83Z2520541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe38076fdf57197737aacd2450c8d5d2a5f9e40f77cd1a6a7469d359a125b20d1. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US83Z2523920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a6abd85972bd3c9ef385b7944ef3625a296920e4bf928156a6c1eb11dadf538. Chain 2 (Bitcoin): anchored in block 957780 (2026-07-13T00:36:44Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US83Z2527378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10089176894d2b0e33dce7a967025ac6aa8022bcebd3a71e7dd16eefe98f8aa1. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US83Z2534999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa384d6e530385851aab89e476c18cb85722e29e83b64fd1ba5f275b7b57655c2. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US83Z2547883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cc1b28a4a43bfe13e57e1a4f4f2f4fd1b3067f1f2ca713c1addec997ac54fe2. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US83Z2550794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb36da6b5aa6f14d5ed19cb1d1252ebded45930bf245f1fe71193538c35946d2e. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US83Z2553752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f9646001148ed244d9fd0c15e3ef6514afb255c2f51aae46dda35a3d22a9eaf. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US83Z2553754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x518761baebdf338701a73c7f2b7bfedfb63f4c719b80eb0020a7b756e3ac0f1b. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US83Z2555331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0aabf531ea7ffba767949eefa9c94d1cbf29fc3bb5f48d363755e4878666d0fb. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US83Z2557821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc89977ee0b810b066678a47a3d6f141ac7e9bca675896007ce47b2543c6eec5f. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US83Z2563442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x388b0d4c26031fd4e401c7252b8c5858e80f3bb55aa7473cab5d9bbcc09f116f. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US83Z2565118.